<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./demo.css">
</head>

<body>
    <div id="container">
        <button class="btn1">打乱</button>
        <button class="btn2">冒泡排序</button>
        <button class="btn3">快速排序</button>
    </div>
</body>
<script src="./demo.js"></script>

</html>